Remove blas and lapack packages
Trac #15685: Remove blas and lapack packages

These packages are both superseded by ATLAS.

URL: http://trac.sagemath.org/15685
Reported by: jdemeyer
Ticket author(s): Jeroen Demeyer
Reviewer(s): Volker Braun
Require autoconf 2.64
sage-clone-source: allow downloading the configure tarball
fix for the m4_divert_push error
Trac #15606: Move checks from prereq.sh to configure

Follow-up after #15580.

URL: http://trac.sagemath.org/15606
Reported by: jdemeyer
Ticket author(s): Jeroen Demeyer
Reviewer(s): Volker Braun
bump confball version
Trac #15700: bdist fails because configure is not downloaded

On my new OSX 10.9 buildbot I get:
{{{
$ ./sage -bdist
Sage version 6.1.beta5, release date 2014-01-15
Error: configure tarball
'/Users/vbraun/Sage/upstream/configure-3.tar.gz' does not exist.
Run sage-autogen and try again.
}}}

URL: http://trac.sagemath.org/15700
Reported by: vbraun
Ticket author(s): Jeroen Demeyer
Reviewer(s): Volker Braun